[Haskell-cafe] looking for alex+happy examples that uses location annotated tokens and location information in err msgs

[Ömer Sinan Ağacan]

I don't think DDC uses alex/happy for parsing:

```
➜  ddc git:(master) find . -iname "*.y"
➜  ddc git:(master) find . -iname "*.x"
```

and there are some Parsec parsers in `packages/ddc-core/DDC/Core/Parser`.

---
Ömer Sinan Ağacan
http://osa1.net


2014-03-09 10:47 GMT+02:00 Erik de Castro Lopo <mle+hs at mega-nerd.com>:
> Ömer Sinan Ağacan wrote:
>
>> Does anyone have any example alex+happy programs that uses location
>> location annotated tokens and location information of token while
>> reporting parse errors?
>>
>> I already wrote lexer and my function type is something like:
>>
>> > runLexer :: String -> [(Token, AlexPosn)]
>>
>> where AlexPosn type contains location information. But I have no idea
>> how can I use that in happy to parse and use location information in
>> parse error messages. There are lots of examples in interwebs but as
>> far as I can see none of them works on location-annotated tokens.
>
> Also look at the DDC codebase:
>
>    https://github.com/DDCSF/ddc
>
> Erik
> --
> ----------------------------------------------------------------------
> Erik de Castro Lopo
> http://www.mega-nerd.com/
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